Leftist Socialist Party of Japan

The Leftist Socialist Party of Japan was a radical socialist political party in Japan that was active from 1948 to 1955. The party, along with the Rightist Socialist Party of Japan, was one of two splintergroups to emerge from the ruins of the first Japan Socialist Party following the JSP's electoral defeat in 1948. The Leftist Socialist Party was radical and Marxist-Leninist, and, in 1955, the Leftists and Rightists merged to reform the JSP.